Lutron Electronics PWA-301 User manual

1. FEATURES
*
T
he quality of the water is getting much more concerned
by the human being and it also an important factor in the
industrial sectors, laboratories or other fields.
* In industrial sectors, it would be a great help for the
quality of the products if using the good water ( more
pure water ) in the process.
* It may cause several diseases if home drink water existing
high conductivity & contain impurities, the Pure Water
T
ester ( Water Quality Tester) are designed to check the
purity of water (water conductivity) also can determine
the condition of the " Water Filter " easily and rapidly.
*
T
he tester is used to measure the conductivity value
( ranging from 0 - 1,999 uS) which can therefore judge
whether water is pure or not. The conductivity value will
become lower if there is much less impurities existed in
water ( for example, distilled water that its purity is higher
than others will get a lower conductivity value of approx.
< 10 uS ).
* Many people always take many kinds of procedures on
water treatment by install the different kinds of
equipment, such as filter or purifier to improve the
quality of water. However, most of people do not
know whether the procedures or filter is effective and
can con- tribute to the quality of water. General
speaking, the impurities will be filtered out if the
water process procedures attain the expected result,
thus we can use this instrument to measure the
conductivity value of purified water and to judge the
effect of the filter (or water process procedures).
* Application : Water conditioning. aquarium, food
processing, photography, school, laboratory, industrial
and quality control.
* Check the condition of water filter.
* Measurement range : 0 to 1,999 uS.
* Pen type, meter with probe, all in 1, easy operation.
* Carbon rod electrode for long life.
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* Build in temperature sensor, ATC ( auto temperature
compensation ).
* IP67, water proof and protection.
* Data hold function for freezing the desired value.
* Auto power off to save the battery life.
* Records max. and min. value with recall.
* Microcomputer circuit, intelligent function, high accuracy.
* Compact size, light weight.
* Power supply by DC 1.5 V battery ( UM4/AAA ) x 4 PCs,
2. SPECIFICATIONS
Display LCD, size : 20 mm x 28 mm.
Measurement 0 to 1999 uS. * uS - micro simens cm.
Resolution 1 uS.
Accuracy ± ( 3 % + 1 d ) F.S.
* F.S. : full scale.
* 23 ± 5 ℃
Temperature Automatic, 0 to 50 ( 32 to 122 ).℃℉
Compensation
Probe Carbon rod electrode for long life.
Structure
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Approx. 0.8 second.
Time
Circuit Custom one-chip of microprocessor LSI
circuit.
Power off Auto shut off saves battery life or
manual off by push button.
* Power will off automatically after
10 min., if no button be pressed.
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Operating 0 to 50 ( 32 to 140 ).℃℉
Temperature
Operating Less than 80% RH.
Humidity
Power Supply DC 1.5V battery ( UM-4/AAA ) x 4 PCs.
Power Approx. 5.7 mA.
Consumption
Dimension 190 x 40 x 40 mm
( 7.5 x 1.6 x 1.6 inch ).
Weight 171 g/0.38 LB.
Standard Instruction Manual.........................
.
1 PC
Accessories
Optional * Soft carrying case with sash
Accessories ( 210 x 80 x 50 mm ), Model : CA-52A
* Hard carrying case
( 280 x 195 x 65 mm ), Model : CA-06
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3. FRONT PANEL DESCRIPTION
3-1 Battery compartment/Cover
3-2 Display
3-3 Power Button
3-4 Hold Button
3-5 REC Button
3-6 Conductivity Electrode
3-7 Protection Cover
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4. MEASURING PROCEDURE
4-1 Check the water's conductivity (water condition)
1)Turn on the meter by pressing the " Power Button "
( 3-3, Fig. 1 ) momentarily.
* Press the " Power Button " ( 3-3, Fig. 1 )
momentarily again will turn off the meter.
The " Display " ( 3-2, Fig. 1 ) will show the unit as :
uS 0
Now the meter is ready for the measurement.
2)Hold the meter by hand and immerse the " Sensing
Electrode " ( 3-6, Fig. 1 ) immersed wholly into the
measured solution. Shake the " Sensing Electrode " to
let the electrode's internal air bubble drift out from the
sensing Electrode.
" Display " ( 3-2, Fig. 1 ) will show the conductivity
values in uS unit,
When make the
measurement should
immerse the " Sensing
Electrode " immersed
Fig. 2 wholly into the measured
solution.
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3)a. If the water is pure, then the meter will display the low
conductivity values, typically. For example the distill
water conductivity value will approx. less than 10 uS.
b. If the water contain the impurity, then the meter will
show the high conductivity typically.
c. From the different water's conductivity value, user can
juge the water quality condition.
( Due to drinking mineral water contain the mineral
material, when measure the mineral water if the meter
display the high conductivity value, it is normal.)
4-2 Check the filter condition
1)Power on the meter by pushing the " Power On Button "
( 3-3, Fig. 1 ).
2)Hold the meter by hand and immerse the " Sensing
Electrode " ( 3-6, Fig. 1 ) immersed wholly into the
measured solution. Shake the " Sensing Electrode " to
let the electrode's internal air bubble drift out from the
sensing Electrode, refer to Fig. 2.
3)First check the reading values ( uS ) for the water that is
not made the treatment ( not via the FILTER ), then
record the reading value, ref. Fig. 3
Fig. 3
6

3)Secondary check the reading values ( uS ) for the water
that already make the treatment ( after the FILTER ),
ref. Fig. 4.
Fig. 4
4)If the water quality already be improved, then the reading
values should be change with a certain values, other wise
the FILTER is dirty or not under the normal condition.
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4-3 Data Hold
1)During the measurement, press the " Hold Button "
( 3-4, Fig. 1 ) momentarily to hold the measured
value. The LCD will show a " HOLD " symbol.
2)Press the " Hold Button " once again to release the
data hold function.
4-4 Data Record ( Max., Min. reading )
1)The data record function records the maximum and
minimum readings. Press the " REC Button " ( 3-5, Fig. 1 )
momentarily to start the Data Record function,
shows " REC " on the display.
2)With the " REC " symbol on the display.
a) Press the " REC Button " ( 3-5, Fig. 1 ) momentarily,
the " REC MAX " symbol along with the maximum
value will appear on the display.
b)Press the " REC Button " ( 3-5, Fig. 1 ) momentarily
again, the " REC MIN " symbol along with the
minimum value will appear on the display.
When display shows " REC MAX " or " REC MIN ",
* press the " Hold Button " ( 3-4, Fig. 1 )
momentarily will delete the max. ( min. ) value,
the display will show the " REC. " only and
execute the memory function continuously.
c) To exit the memory record function, press the
" REC " button for 2 seconds at least. The display will
revert to the current reading, not show " REC "
indicator.
4-5 Auto power off management
The meter has built-in "Auto Power Shut-off " function in
order to prolong battery life. The meter will switch off
automatically if none of the buttons are pressed within
10 min..
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